ABAP Select data from SAP table P2MX_GRDBT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2MX_GRDBT table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to P2MX_GRDBT. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the P2MX_GRDBT table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_P2MX_GRDBT TYPE STANDARD TABLE OF P2MX_GRDBT,
      WA_P2MX_GRDBT TYPE P2MX_GRDBT,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <P2MX_GRDBT> TYPE P2MX_GRDBT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2MX_GRDBT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2MX_GRDBT
  INTO TABLE IT_P2MX_GRDBT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2MX_GRDBT
*  INTO TABLE @DATA(IT_P2MX_GRDBT2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_P2MX_GRDBT INDEX 1 INTO DATA(WA_P2MX_GRDBT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2MX_GRDBT ASSIGNING <P2MX_GRDBT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2MX_GRDBT>-MANDT = 1.
<P2MX_GRDBT>-DCT_PERNR = 1.
<P2MX_GRDBT>-DCT_SEQNR = 1.
<P2MX_GRDBT>-DCT_ROWID = 1.
<P2MX_GRDBT>-IONUM = 1.

ENDLOOP.

LOOP AT IT_P2MX_GRDBT INTO WA_P2MX_GRDBT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2MX_GRDBT-OBJPS, sy-vline,
  WA_P2MX_GRDBT-DBCOD, sy-vline,
  WA_P2MX_GRDBT-LGART, sy-vline,
  WA_P2MX_GRDBT-DBCAT, sy-vline,
  WA_P2MX_GRDBT-CRCOD, sy-vline,
  WA_P2MX_GRDBT-CRSPY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2MX_GRDBT you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_P2MX_GRDBT TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_P2MX_GRDBT INTO WA_P2MX_GRDBT.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_P2MX_GRDBT_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
IONUM TYPE STRING,
OBJPS TYPE STRING,
DBCOD TYPE STRING,
LGART TYPE STRING,
DBCAT TYPE STRING,
CRCOD TYPE STRING,
CRSPY TYPE STRING,
INSID TYPE STRING,
PDECR TYPE STRING,
FDECR TYPE STRING,
UNIDA TYPE STRING,
ACPRP TYPE STRING,
AMTOD TYPE STRING,
AYTOD TYPE STRING,
ATTOD TYPE STRING,
AREQR TYPE STRING,
APNOW TYPE STRING,
APPRE TYPE STRING,
GCURR TYPE STRING,
NCURR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2MX_GRDBT_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_P2MX_GRDBT_STR-MANDT sy-vline 
WA_P2MX_GRDBT_STR-DCT_PERNR sy-vline 
WA_P2MX_GRDBT_STR-DCT_SEQNR sy-vline 
WA_P2MX_GRDBT_STR-DCT_ROWID sy-vline 
WA_P2MX_GRDBT_STR-IONUM sy-vline 
WA_P2MX_GRDBT_STR-OBJPS sy-vline 
WA_P2MX_GRDBT_STR-DBCOD sy-vline 
WA_P2MX_GRDBT_STR-LGART sy-vline 
WA_P2MX_GRDBT_STR-DBCAT sy-vline 
WA_P2MX_GRDBT_STR-CRCOD sy-vline 
WA_P2MX_GRDBT_STR-CRSPY sy-vline 
WA_P2MX_GRDBT_STR-INSID sy-vline 
WA_P2MX_GRDBT_STR-PDECR sy-vline 
WA_P2MX_GRDBT_STR-FDECR sy-vline 
WA_P2MX_GRDBT_STR-UNIDA sy-vline 
WA_P2MX_GRDBT_STR-ACPRP sy-vline 
WA_P2MX_GRDBT_STR-AMTOD sy-vline 
WA_P2MX_GRDBT_STR-AYTOD sy-vline 
WA_P2MX_GRDBT_STR-ATTOD sy-vline 
WA_P2MX_GRDBT_STR-AREQR sy-vline 
WA_P2MX_GRDBT_STR-APNOW sy-vline 
WA_P2MX_GRDBT_STR-APPRE sy-vline 
WA_P2MX_GRDBT_STR-GCURR sy-vline 
WA_P2MX_GRDBT_STR-NCURR sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.